In a major move that is expected not only to benefit
waitlisted passengers but also benefit the railways in terms
of filling up vacant accommodation in various trains, the
railways had introduced a scheme, on an experimental basis, to upgrade full fare paying waiting list passengers to the next higher class against the available vacant accommodation, with effect from 26th January 2006.

Later the scheme was extended to all Mail Express Trains
w.e.f.24.02.2006 and to all Special Trains to be run during
summer/winter/holidays and having 3AC Coaches (Rly Board
letter No.2005/TG-I/20/P/Up gradation dated: 21/03/2006